remove unused imports

attic/_version.py

@@ -15,7 +15,6 @@ git_full = "$Format:%H$"
 
 
 import subprocess
-import sys
 
 
 def run_command(args, cwd=None, verbose=False):

attic/helpers.py

@@ -5,7 +5,6 @@ import msgpack
 import os
 import pwd
 import re
-import stat
 import sys
 import time
 from datetime import datetime, timezone, timedelta

attic/repository.py

@@ -3,7 +3,6 @@ from binascii import hexlify
 from itertools import islice
 import errno
 import os
-import shutil
 import struct
 import sys
 from zlib import crc32